MySQL reports that the column timestamp field cannot be null

The error message is as follows

java.sql.SQLIntegrityConstraintViolationException: Column ‘xxx’ cannot be null;

among xxx Fields are timestamp(6)

Our own production is normal , The customer reported the above error in the independent deployment . perform insert Statement violates integrity constraints .

Check that the code has not been modified recently , Finally, it is locked to the database configuration

By comparing our configuration with that of the customer, it is found that when the following statement is executed

SHOW GLOBAL VARIABLES LIKE '%explicit_defaults_for_timestamp%'

Our environment variable configuration is OFF

The customer's is ON

For specific analysis, please refer to This article

Knowing the reason, you can solve the problem with a little modification .